Side brush



FIG. 1 is a side elevation view of a side brush showing my new design, all other side elevations views being mirror images;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is an overhead perspective view thereof; and,

FIG. 5 is a bottom perspective view thereof. 

CLAIM The ornamental design for a side brush, as shown and described. 